package org.lee.netty.sample;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;

import java.nio.charset.StandardCharsets;

/**
 * NettyClientHandler
 * 客户端处理器
 *
 * @author dralee
 * @date 2022-01-01 17:13:45
 **/
public class NettyClientHandler extends ChannelInboundHandlerAdapter {

    // 当通道就绪就会触发该方法
    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {

        System.out.println("client: " + ctx);
        ctx.writeAndFlush(Unpooled.copiedBuffer("hello, server: (>^ω^<)喵~".getBytes(StandardCharsets.UTF_8)));
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        cause.printStackTrace();
        ctx.close();
    }

    // 当通道有读取事件时，会触发
    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        ByteBuf buffer = (ByteBuf) msg;
        System.out.println("服务器回复的消息：" + buffer.toString(StandardCharsets.UTF_8));
        System.out.println("服务器的地址：" + ctx.channel().remoteAddress());
    }
}
